Trolley-harp.



J. W. MGKINNEY.

TROLLEY HARP.

APPLIUATION FILED MAY 24, 1913.

1,098,456, n f Patented June 2, 1914.

UNTED STATES PATENT OFFIlt.

JGHN W. MCKINNIEY, 0l? TYRONE, PENNSYLVANIA.

TBOLLEYJ-IARP.

To all 'whom it may concern Be it known that l, JOHN lV. MCKINNEY, of Tyrone, in the county of vBlair and State of APennsylvania, have invented certain new and useful. improvements in Trolley-Harris; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which forni part of this speciiication.

This invention isan improvement in trolley harps for use on electric ailways and provides a novel detachable connection between the harp and the trolley pole.

I will explain the invention in detail with reference to the accompanying drawings, and summarize in the claims the essential features and combinations of parts wherein the invention resides and for which protection is desired; but the invention is not restrict-ed to the particular construction or proportions of parts shown in the drawings as these can be varied by the designer while embodying the essential novel features of the invention.

ln said drawings-Figure 1 is a sectional elevation of the complete trolley head. Fig. 2 is a detail sectional view of the devices for attaching the harp to the pole.

in the drawings l designates a trolley harp, which is adapted to be attached to the '-rolley pole. The bifurcations ll of said harp support a shaft 2 on which the trolley wheel 3 is mounted. This wheel may be of any suitable construction.

The shank of the harp is preferably provided with an axial opening or socket which is enlarged at its upper end, as indicated at l, and above this enlargement is closed by a partition 1P, which has a narrow slot rectangular in cross section in it; and in the chainber ln at opposite sides of this slot are beveled shoulders ls (Fig. 2). Attached to the end of the pole 9 is a stud 9b which is adapted to enter the socket in the harp and extend through the pocket l, said stud hav ing a rectangular head 9c on its upper end which is adapted to lit" in the rectangular slot in the partition l, and slightly project therethrough; and beneath this head the shank is provided with beveled shoulders 9e which are adapted to lit closely against the beveled shoulders 1S in the shank, see Fig. 2, and form a close joint therewith; and when the harp is slipped onto the stud and posi- Specification of Letters Patent.

Application filed May 24, 1913.

Patented J une 2, 1914.

Serial No. 769,635.

tioned thereon, as indicated in Figs. 1 and 2, it will be seen that the harp cannot rotate on the pole but has a close tit thereon and will be securely held against rotatorial inoven'lent on the stud so long as the parts are engaged, as indicated in Fig. 2.

.lin order to detachably lock the harp to the stud I forni head 9c with a hook 9i which is parallel with the head and is adapted to be engaged by a retainer 9u, consisting` of a sinall nletal plate, preferably rectangular in form, having an eye 90 in one end which can be engaged with the hook 9f; and this re tainer also has an eye 9p which can be engaged by the guy rope R of the trolley. It will be seen that when the retainer is en gaged with the hook the harp will be se curely locked to the pole and it cannot be casually disengaged therefrom; and it is necessary, in order to engage or disengage the retainer from the hook, that the retainer be lirst turned to the position indicated in dotted lines in Fig. 2; z'. e. at right angles to its normal position, and then turned to engage or disengage the hook 9f, and then when engaged with the hook, swung over to the position indicated in F iff. l. In such position it cannot become casually disengaged from the hook, nor can it be forcibly disengaged from the hook unless it is first turned to the position indicated in dotted lines Fig. 2, and this position is one which necessitates manual handling of the retainer. By this .means the harp is practically permanently secured to the pole, and yet can be easily disengaged therefrom if it is neces sary to repair the harp or the wheel; and by having` the harp detachable repairs of the harp or wheel can be Inade with much less trouble than if the harp is permanently attached to the pole. The retainer also provides a nieans of attachment of the guy rope R to the pole; and pull on the rope direct to the pole, instead of through the harp is transmitted, which is also a practical advantage.

lWhat l claim is:

l. In combination, a trolley harp having a shank provided with a socket; a slot at the upper end of the socket; a stud adapted to tit in the socket and having a head on its end adapted to project through the slot, and ineans engaging the head to secure the stud to the socket.

2. ln combination, a trolley harp having a shank provided with a Socket, and a slot at the upper end of the socket; a Stud adapted to iit in the socket and having a head on its end adapted to project through the slot, and a hook on the end of said head; With a retainer adapted to be detaohably engaged with said hook to detaohably secure the harp to the Stud, substantially as described.

3. In Combination, a trolley harp having a shank provided with a Socket, a slot at the upper end of the socket, and beveled Shoulders at the inner end of the slot; a Stud adapted to t in the socket and having` beveled shoulders adapted to engage the beveled shoulders in the socket; a head adapted to project through the slot; and a hook on the end of said head; With a retainer adapted to be detachably engaged With said hook to secure the harp to the stud, substantially as described.

4. In combination, a trolley harp having a shank provided with a socket and a slot at the upper end of the socket, a stud adapted to engage the Socket and having a hook on its end adapted to project through the slot, and a retainer adapted to deta-ehably engage said hook to detachably secure the harp to the stud.

In testimony that I cla-im the foregoing as my own, I aHiX my signature in presence of two Witnesses.

JOI-IN IV. MGKINNEY.

lVit-nesses WVM. W. LoWER, A. B. IVOODRING.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents. Washington, 1). G. 

